Thanks for the comments and kind words. I'm still new to this so maybe you can help me out. I took all these photos in RAW format with my D90, and I decreased the exposure of the interior shots to decrease noise when opening them using Photoshop. Is there another way to minimize noise in the post process without darkening the images? If I had increased exposure while shooting wouldn't I also have run into noise problems? That said, the photos are accurate to the conditions at the time, and I'm happy with the way they turned out. Thanks again for the comments.

Thanks for the comments and kind words. I'm still new to this so maybe you can help me out. I took all these photos in RAW format with my D90, and I decreased the exposure of the interior shots to decrease noise when opening them using Photoshop. Is there another way to minimize noise in the post process without darkening the images? If I had increased exposure while shooting wouldn't I also have run into noise problems? That said, the photos are accurate to the conditions at the time, and I'm happy with the way they turned out. Thanks again for the comments.

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With your D90 noise will not be an issue.

Here it is said from another site:
Borrowing its 12.3MP APS-Csized CMOS sensor from the higherend D300, the D90 is the fourth successive 12MP Nikon DSLR. Clearly, the company has eased off the megapixel race, instead focusing on other areas of image quality, such as low noise at high ISOs and convenient features. And the results are impressive. In our lab tests, the D90 scored Excellent in overall image quality right up through ISO 3200.